:root {
  --teal-900: #0f5c57;
  --teal-700: #147a74;
  --teal-500: #1ab3ac;
  --teal-300: #7fd4cf;
  --teal-100: #e8f7f5;
  --teal-50: #f4faf9;
  --ink: #1c1f23;
  --ink-soft: #5a7375;
  --ink-mute: #8a9a9c;
  --warm: #f89a1d;
  --warm-soft: #ffd9a8;
  --paper: #f7fcfb;
  --line: rgba(20, 122, 116, 0.14);
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(26, 179, 172, 0.12), transparent 60%),
    radial-gradient(900px 500px at 100% 20%, rgba(248, 154, 29, 0.08), transparent 55%),
    var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.container {
  width: min(1120px, calc(100% - 48px));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  backdrop-filter: blur(14px);
  background: rgba(247, 252, 251, 0.82);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(247, 252, 251, 0.94);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  border-radius: 10px;
  box-shadow: 0 6px 16px rgba(26, 179, 172, 0.22);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  color: var(--teal-900);
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  font-size: 0.95rem;
  color: var(--ink-soft);
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--teal-700);
}

.nav-cta {
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--teal-500);
  color: #fff !important;
  font-weight: 600;
  transition: transform 0.25s var(--ease), background 0.2s ease;
}

.nav-cta:hover {
  background: var(--teal-700);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  padding: 12px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--teal-900);
  margin: 6px 0;
  transition: transform 0.25s var(--ease), opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}

.hero-atmosphere {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(135deg, #d9f3f0 0%, #f4faf9 42%, #fff4e6 100%),
    repeating-linear-gradient(
      -18deg,
      transparent,
      transparent 28px,
      rgba(26, 179, 172, 0.035) 28px,
      rgba(26, 179, 172, 0.035) 29px
    );
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
  padding: 48px 0 72px;
}

.hero-brand {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 4.6rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.06em;
  color: var(--teal-900);
  animation: rise 0.9s var(--ease) both;
}

.hero-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
  animation: rise 0.9s var(--ease) 0.08s both;
}

.hero-lead {
  margin: 0 0 32px;
  max-width: 34em;
  font-size: 1.05rem;
  color: var(--ink-soft);
  animation: rise 0.9s var(--ease) 0.16s both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  animation: rise 0.9s var(--ease) 0.24s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  transition: transform 0.25s var(--ease), background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: var(--teal-500);
  color: #fff;
  box-shadow: 0 12px 28px rgba(26, 179, 172, 0.28);
}

.btn-primary:hover {
  background: var(--teal-700);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--teal-900);
  border: 1.5px solid rgba(20, 122, 116, 0.35);
}

.btn-ghost:hover {
  background: rgba(26, 179, 172, 0.08);
  transform: translateY(-2px);
}

.hero-visual {
  animation: float-in 1.1s var(--ease) 0.18s both;
}

.hero-art {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 24px 48px rgba(15, 92, 87, 0.18));
}

.hero-fade {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--paper));
  pointer-events: none;
}

/* Sections */
.section {
  padding: 96px 0;
}

.section-head {
  text-align: center;
  max-width: 36em;
  margin: 0 auto 56px;
}

.section-head--left {
  text-align: left;
  margin-left: 0;
}

.section-head h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--teal-900);
}

.section-head p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.feature-rail {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px 24px;
}

.feature-rail li {
  padding-top: 8px;
  border-top: 2px solid var(--teal-500);
}

.feature-index {
  display: block;
  margin-bottom: 18px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: var(--warm);
}

.feature-rail h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  font-weight: 700;
}

.feature-rail p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.96rem;
}

/* Roles */
.roles {
  background:
    linear-gradient(180deg, transparent, rgba(232, 247, 245, 0.7) 20%, rgba(232, 247, 245, 0.7) 80%, transparent);
}

.role-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.role-pane {
  padding: 48px 40px;
}

.role-pane + .role-pane {
  border-left: 1px solid var(--line);
}

.role-pane--accent {
  background: linear-gradient(160deg, rgba(26, 179, 172, 0.08), rgba(248, 154, 29, 0.08));
}

.role-label {
  margin: 0 0 12px;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal-700);
  font-weight: 600;
}

.role-pane h3 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.35;
}

.role-pane p:last-child {
  margin: 0;
  color: var(--ink-soft);
}

/* Company */
.company-layout {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 48px;
  align-items: start;
}

.company-facts {
  margin: 0;
  display: grid;
  gap: 28px;
}

.company-facts div {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.company-facts dt {
  margin-bottom: 8px;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
}

.company-facts dd {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.55;
}

/* Contact */
.contact {
  padding-top: 40px;
}

.contact-panel {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding: 48px 0 8px;
  border-top: 2px solid var(--teal-500);
}

.contact-copy h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  color: var(--teal-900);
}

.contact-copy p {
  margin: 0;
  max-width: 28em;
  color: var(--ink-soft);
}

.contact-meta {
  text-align: right;
  color: var(--ink-soft);
}

.contact-meta p {
  margin: 0 0 8px;
}

.contact-meta span {
  display: inline-block;
  min-width: 2.5em;
  margin-right: 10px;
  color: var(--ink-mute);
  font-size: 0.85rem;
}

/* Footer */
.site-footer {
  padding: 40px 0 56px;
  border-top: 1px solid var(--line);
  background: #eef8f6;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 24px 40px;
  align-items: flex-start;
  justify-content: space-between;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.footer-brand img {
  border-radius: 8px;
}

.footer-brand strong {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--teal-900);
}

.footer-legal {
  margin: 0;
  max-width: 42em;
  font-size: 0.88rem;
  color: var(--ink-mute);
  line-height: 1.7;
  text-align: right;
}

/* Motion */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes float-in {
  from {
    opacity: 0;
    transform: translateY(36px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal,
  .hero-brand,
  .hero-title,
  .hero-lead,
  .hero-actions,
  .hero-visual {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* Responsive */
@media (max-width: 960px) {
  .hero-layout,
  .company-layout,
  .feature-rail,
  .role-split {
    grid-template-columns: 1fr;
  }

  .feature-rail {
    gap: 32px;
  }

  .role-pane + .role-pane {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .hero-visual {
    order: -1;
  }

  .hero {
    min-height: auto;
  }

  .hero-layout {
    padding-top: 28px;
  }

  .contact-panel {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-meta {
    text-align: left;
  }

  .footer-legal {
    text-align: left;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 20px;
    background: rgba(247, 252, 251, 0.98);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 32px rgba(15, 92, 87, 0.08);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    margin-top: 12px;
    text-align: center;
    border-bottom: 0 !important;
  }

  .container {
    width: min(1120px, calc(100% - 32px));
  }

  .section {
    padding: 72px 0;
  }

  .role-pane {
    padding: 36px 8px;
  }

  .hero-brand {
    letter-spacing: 0.04em;
  }
}